Keyboard switch
AssigneeOmron Tateisi Electronics Co.
InventorsHaruyuki Koizumi, Koichi Omae
Life of this patent
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Abstract
A keyboard switch is provided which comprises a substrate on the upper surface of which a flexible switch is disposed that has paired fixed and movable contacts and includes a flexible sheet, guide posts passing through and secured to the substrate at mutually opposed positions on either side of the contacts, a key plunger fitted vertically movably in the guide posts, and a coil spring interposed between the key plunger and the substrate. The coil spring functions so that it pushes the flexible switch when compressed to cause the paired contacts to come into contact with each other and, when uncompressed, returns the key plunger to the initial position thereby to separate the paired contacts.
Claims6
A keyboard switch comprising:
- a substrate having on an upper surface thereof a flexible switch which has a pair of spaced engageable contacts, at least one of said contacts being fixed to a flexible sheet,
- at least two guide posts passing through respective apertures in said substrate and being secured to said substrate at mutually opposed positions on either side of said contacts,
- a key plunger having spaced extending leg portions respectively fitted vertically movably in said guide posts, said key plunger being capable of reciprocal up and down movement with said leg portions being guided by said guide posts and moving through said substrate during said reciprocal movement, and
- a coil spring interposed between said key plunger and said substrate, said coil spring pushing said flexible switch, when compressed by a depression of said plunger, to cause said paired contacts to come into contact with each other and, when uncompressed, returning said key plunger to an initial position to separate said paired contacts.
Dependencies are inferred from the claim text.